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<h1>SQLAlchemy 0.4 Documentation</h1>

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<div class="versionheader">Version: 0.4.8   Last Updated: 10/12/08 13:33:19</div>












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        <h2>module sqlalchemy.databases.postgres</h2>
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    <ul>
        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_modfunc">Module Functions</a></li>

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    <ul>
        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_modfunc_descriptor">descriptor()</a></li>

    </ul>

	        </li>
        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGArray">class PGArray(MutableType,Concatenable,TypeEngine)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGBigInteger">class PGBigInteger(PGInteger)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGBinary">class PGBinary(Binary)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGBoolean">class PGBoolean(Boolean)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGChar">class PGChar(CHAR)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGCidr">class PGCidr(TypeEngine)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGCompiler">class PGCompiler(DefaultCompiler)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGDate">class PGDate(Date)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGDateTime">class PGDateTime(DateTime)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGDefaultRunner">class PGDefaultRunner(DefaultRunner)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGDialect">class PGDialect(DefaultDialect)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGExecutionContext">class PGExecutionContext(DefaultExecutionContext)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGFloat">class PGFloat(Float)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGIdentifierPreparer">class PGIdentifierPreparer(IdentifierPreparer)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGInet">class PGInet(TypeEngine)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGInteger">class PGInteger(Integer)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGInterval">class PGInterval(TypeEngine)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGMacAddr">class PGMacAddr(TypeEngine)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGNumeric">class PGNumeric(Numeric)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGSchemaDropper">class PGSchemaDropper(SchemaDropper)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGSchemaGenerator">class PGSchemaGenerator(SchemaGenerator)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGSmallInteger">class PGSmallInteger(SmallInteger)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGString">class PGString(String)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGText">class PGText(Text)</a></li>

        
        <li><a style="" href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGTime">class PGTime(Time)</a></li>

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    <A name="docstrings_sqlalchemy.databases.postgres"></a>
    
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    <h3>module sqlalchemy.databases.postgres</h3>
    
    
    <div class="darkcell"><p>Support for the PostgreSQL database.</p>
<p>PostgreSQL supports partial indexes. To create them pass a posgres_where
option to the Index constructor:</p>
<pre class="literal-block">
Index('my_index', my_table.c.id, postgres_where=tbl.c.value &gt; 10)
</pre>
<p>PostgreSQL 8.2+ supports returning a result set from inserts and updates.
To use this pass the column/expression list to the postgres_returning
parameter when creating the queries:</p>
<pre class="literal-block">
raises = tbl.update(empl.c.sales &gt; 100, values=dict(salary=empl.c.salary * 1.1),
  postgres_returning=[empl.c.id, empl.c.salary]).execute().fetchall()
</pre>
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    <h3>Module Functions</h3>
    
    
                
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    <b>def descriptor()</b>
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    <h3>class PGArray(MutableType,Concatenable,<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_TypeEngine">TypeEngine</a>)</h3>
    
    
    

                    
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    <b>def __init__(<i>self</i>, <i>item_type</i>, <i>mutable=True</i>)</b>
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    <p>Construct a new <tt class="docutils literal"><span class="pre">PGArray</span></tt>.</p>

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    <b>def bind_processor(<i>self</i>, <i>dialect</i>)</b>
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    <b>def compare_values(<i>self</i>, <i>x</i>, <i>y</i>)</b>
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    <b>def dialect_impl(<i>self</i>, <i>dialect</i>, <i>**kwargs</i>)</b>
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    <b>def get_col_spec(<i>self</i>)</b>
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    <b>def is_mutable(<i>self</i>)</b>
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    <b>def result_processor(<i>self</i>, <i>dialect</i>)</b>
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    <A name="docstrings_sqlalchemy.databases.postgres_PGBigInteger"></a>
    
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    <h3>class PGBigInteger(<a href="sqlalchemy_databases_postgres.html#docstrings_sqlalchemy.databases.postgres_PGInteger">PGInteger</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGBinary(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Binary">Binary</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGBoolean(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Boolean">Boolean</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGChar(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_CHAR">CHAR</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGCidr(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_TypeEngine">TypeEngine</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGCompiler(<a href="sqlalchemy_sql_compiler.html#docstrings_sqlalchemy.sql.compiler_DefaultCompiler">DefaultCompiler</a>)</h3>
    
    
    

                    
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    <b>def for_update_clause(<i>self</i>, <i>select</i>)</b>
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    <b>def get_select_precolumns(<i>self</i>, <i>select</i>)</b>
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    <b>def visit_insert(<i>self</i>, <i>insert_stmt</i>)</b>
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    <b>def visit_update(<i>self</i>, <i>update_stmt</i>)</b>
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    <h3>class PGDate(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Date">Date</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGDateTime(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_DateTime">DateTime</a>)</h3>
    
    
    

                    
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    <b>def get_col_spec(<i>self</i>)</b>
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    <h3>class PGDefaultRunner(<a href="sqlalchemy_engine.html#docstrings_sqlalchemy.engine_DefaultRunner">DefaultRunner</a>)</h3>
    
    
    

                    
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    <b>def __init__(<i>self</i>, <i>context</i>)</b>
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    <p>Construct a new <tt class="docutils literal"><span class="pre">PGDefaultRunner</span></tt>.</p>

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    <b>def get_column_default(<i>self</i>, <i>column</i>, <i>isinsert=True</i>)</b>
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    <h3>class PGDialect(<a href="sqlalchemy_engine_default.html#docstrings_sqlalchemy.engine.default_DefaultDialect">DefaultDialect</a>)</h3>
    
    
    

                    
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    <b>def __init__(<i>self</i>, <i>use_oids=False</i>, <i>server_side_cursors=False</i>, <i>**kwargs</i>)</b>
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    <p>Construct a new <tt class="docutils literal"><span class="pre">PGDialect</span></tt>.</p>

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    <b>def do_begin_twophase(<i>self</i>, <i>connection</i>, <i>xid</i>)</b>
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    <b>def do_commit_twophase(<i>self</i>, <i>connection</i>, <i>xid</i>, <i>is_prepared=True</i>, <i>recover=False</i>)</b>
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    <b>def do_rollback_twophase(<i>self</i>, <i>connection</i>, <i>xid</i>, <i>is_prepared=True</i>, <i>recover=False</i>)</b>
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    <b>def get_default_schema_name(<i>self</i>, <i>connection</i>)</b>
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    <h3>class PGExecutionContext(<a href="sqlalchemy_engine_default.html#docstrings_sqlalchemy.engine.default_DefaultExecutionContext">DefaultExecutionContext</a>)</h3>
    
    
    

                    
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    <h3>class PGFloat(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Float">Float</a>)</h3>
    
    
    

                    
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    <h3>class PGIdentifierPreparer(<a href="sqlalchemy_sql_compiler.html#docstrings_sqlalchemy.sql.compiler_IdentifierPreparer">IdentifierPreparer</a>)</h3>
    
    
    


    

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    <h3>class PGInet(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_TypeEngine">TypeEngine</a>)</h3>
    
    
    

                    
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    <h3>class PGInteger(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Integer">Integer</a>)</h3>
    
    
    

                    
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    <A name="docstrings_sqlalchemy.databases.postgres_PGInterval"></a>
    
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    <h3>class PGInterval(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_TypeEngine">TypeEngine</a>)</h3>
    
    
    

                    
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    <A name="docstrings_sqlalchemy.databases.postgres_PGMacAddr"></a>
    
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    <h3>class PGMacAddr(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_TypeEngine">TypeEngine</a>)</h3>
    
    
    

                    
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    <h3>class PGNumeric(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Numeric">Numeric</a>)</h3>
    
    
    

                    
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    <h3>class PGSchemaDropper(<a href="sqlalchemy_sql_compiler.html#docstrings_sqlalchemy.sql.compiler_SchemaDropper">SchemaDropper</a>)</h3>
    
    
    

                    
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    <h3>class PGSchemaGenerator(<a href="sqlalchemy_sql_compiler.html#docstrings_sqlalchemy.sql.compiler_SchemaGenerator">SchemaGenerator</a>)</h3>
    
    
    

                    
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    <h3>class PGSmallInteger(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_SmallInteger">SmallInteger</a>)</h3>
    
    
    

                    
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    <h3>class PGString(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_String">String</a>)</h3>
    
    
    

                    
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    <A name="docstrings_sqlalchemy.databases.postgres_PGText"></a>
    
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    <h3>class PGText(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Text">Text</a>)</h3>
    
    
    

                    
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    <A name="docstrings_sqlalchemy.databases.postgres_PGTime"></a>
    
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    <h3>class PGTime(<a href="sqlalchemy_types.html#docstrings_sqlalchemy.types_Time">Time</a>)</h3>
    
    
    

                    
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